1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.dao.shard;
24  
25  import com.liferay.portal.util.PropsValues;
26  
27  import java.util.Map;
28  
29  import javax.sql.DataSource;
30  
31  import org.springframework.aop.TargetSource;
32  
33  /**
34   * <a href="ShardDataSourceTargetSource.java.html"><b><i>View Source</i></b></a>
35   *
36   * @author Michael Young
37   */
38  public class ShardDataSourceTargetSource implements TargetSource {
39  
40      public DataSource getDataSource() {
41          return _dataSourceThreadLocal.get();
42      }
43  
44      public Object getTarget() throws Exception {
45          return getDataSource();
46      }
47  
48      public Class<DataSource> getTargetClass() {
49          return DataSource.class;
50      }
51  
52      public boolean isStatic() {
53          return false;
54      }
55  
56      public void releaseTarget(Object target) throws Exception {
57      }
58  
59      public void setDataSource(String shardName) {
60          _dataSourceThreadLocal.set(_dataSources.get(shardName));
61      }
62  
63      public void setDataSources(Map<String, DataSource> dataSources) {
64          _dataSources = dataSources;
65      }
66  
67      private static Map<String, DataSource> _dataSources;
68  
69      private static ThreadLocal<DataSource> _dataSourceThreadLocal =
70          new ThreadLocal<DataSource>() {
71  
72          protected DataSource initialValue() {
73              return _dataSources.get(PropsValues.SHARD_DEFAULT_NAME);
74          }
75  
76      };
77  
78  }